Add NutNetLoadDefaults to load default values for MAC Address and network settings to make it easier to implement a reset to factory settings function in applications.
STM32: Fix porttran GPIO which in turn fixes the HD44780 driver for STM32
STM32: Enable FLASH_CONF_SIZE on configurator. Was already in use on .conf files from boards but only available when hand editing the files.
AVR32: Missing interrupt handler for GPIO port 3.
AVR32: Improve stability with MACB on INT3.
STM32: Add STM32F407xE with 512Kb flash and rename existing STM32F407 to STM32F407xG.
Do not generate local MAC Address when one is specified by nutconf, use the default value from configuration instead.
Fix build with newer AVR32 Toolchain.